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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
/*=========================================================================
*
* Portions of this file are subject to the VTK Toolkit Version 3 copyright.
*
* Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
*
* For complete copyright, license and disclaimer of warranty information
* please refer to the NOTICE file at the top of the ITK source tree.
*
*=========================================================================*/
#ifndef itkFEMFactoryBase_h
#define itkFEMFactoryBase_h
#include "itkObjectFactoryBase.h"
#include <mutex>
#include "ITKFEMExport.h"
namespace itk
{
/** \class FEMFactoryBase
* \brief Create instances of FEM Objects.
* This includes Elements, Loads, and Materials
* \ingroup ITKFEM
*/
class ITKFEM_EXPORT FEMFactoryBase : public ObjectFactoryBase
{
public:
ITK_DISALLOW_COPY_AND_MOVE(FEMFactoryBase);
/** Standard class type aliases. */
using Self = FEMFactoryBase;
using Superclass = ObjectFactoryBase;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Class methods used to interface with the registered factories. */
const char *
GetITKSourceVersion() const override;
const char *
GetDescription() const override;
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(FEMFactoryBase);
/** Method for class instantiation. */
itkFactorylessNewMacro(Self);
/** Register all builtin transforms */
static void
RegisterDefaultTypes(); // HACK: This should not have a public interface since it does nothing except during
// instantiation of the class.
/** Register this transform */
static FEMFactoryBase *
GetFactory()
{
if (m_Factory == nullptr)
{
const std::lock_guard<std::mutex> lockGuard(m_CreationMutex);
// Need to make sure that during gaining access
// to the lock that some other thread did not
// initialize the singleton.
if (m_Factory == nullptr)
{
// Make and register the factory
auto p = FEMFactoryBase::New();
if (p.IsNull())
{
itkGenericExceptionMacro("FEMFactoryBase instance not created");
}
ObjectFactoryBase::RegisterFactory(p);
m_Factory = p.GetPointer();
}
m_Factory->RegisterDefaultTypes(); // Not initialize all default types.
}
return m_Factory;
}
void
RegisterType(const char * classOverride,
const char * overrideClassName,
const char * description,
bool enableFlag,
CreateObjectFunctionBase * createFunction)
{
this->RegisterOverride(classOverride, overrideClassName, description, enableFlag, createFunction);
}
protected:
FEMFactoryBase();
~FEMFactoryBase() override;
private:
static std::mutex m_CreationMutex;
static FEMFactoryBase * m_Factory;
};
} // end namespace itk
#endif // itkFEMFactoryBase_h
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